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RuleUpdateAction Class

Indicates that a rule is updating a variable, in order to cause reevaluation of affected rules.

Namespace:  System.Workflow.Activities.Rules
Assembly:  System.Workflow.Activities (in System.Workflow.Activities.dll)

public class RuleUpdateAction : RuleAction

This class is used to indicate to the rules engine that execution of this rule's set of actions causes a change to the field or property that is specified (or all fields and properties on an object), so that any rules that are dependent on this field or property can be reevaluated.

An Update call does not prevent other actions in the action block from executing. The set of fields/properties that are modified (specified through Update or by using RuleWriteAttributes on methods invoked) is used to determine chaining when the set of actions for this particular rule finishes executing.


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0